Enum OverlayAnchor 

pub enum OverlayAnchor {
    Owner,
    Rect(Rect),
}

The overlay-portal authoring surface: the slot a widget that floats its own surface holds, what that surface is anchored to, and the placement geometry every anchored pattern needs.

Promoted here rather than left to each design system because all three of them had derived the same geometry independently: a design system’s popover, menu, tooltip and context menu place a surface through place and host it through OverlaySlot, reaching both through frust::authoring alone. The overlay-portal authoring surface: the slot a widget that floats its own surface holds, what that surface is anchored to, and the placement geometry every anchored pattern needs.

Promoted here rather than left to each design system because all three of them had derived the same geometry independently: a design system’s popover, menu, tooltip and context menu place a surface through place and host it through OverlaySlot, reaching both through frust::authoring alone. The overlay-portal authoring surface: the slot a widget that floats its own surface holds, what that surface is anchored to, and the placement geometry every anchored pattern needs.

Promoted here rather than left to each design system because all three of them had derived the same geometry independently: a design system’s popover, menu, tooltip and context menu place a surface through place and host it through OverlaySlot, reaching both through frust::authoring alone. What a slot places its surface against.

Both variants resolve to a window-space rect in the owner’s paint, where the owner’s absolute origin is finally known; nothing is subscribed to and nothing is cached across frames, so an anchor follows its owner across scroll, relayout and animation for free.

Variants

Owner

The owner’s own bounds — a trigger floating a menu under itself.

Rect(Rect)

A rect in the owner’s local space: a caret, a selection’s bounding box, a press point, one row of a list. Translated by the owner’s paint origin, so a caller states it in the same coordinates its layout and event already speak.

Trait Implementations

impl Clone for OverlayAnchor

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for OverlayAnchor

impl Debug for OverlayAnchor

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for OverlayAnchor

fn default() -> Self

Returns the “default value” for a type.

impl PartialEq for OverlayAnchor

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for OverlayAnchor